Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-19-2021, 04:21 PM   #1
2 Rivet Member
 
2013 27' Flying Cloud
Calgary , Alberta
Join Date: Mar 2020
Posts: 83
Success finding the Solar pre-wire on the roof!

After a long ordeal I finally been able to find the factory solar pre-wire and terminate it at the roof! I first asked the dealership to find and terminate it for me when they were replacing the skylight. The pre-wire was not in the rear fantastic fan like itís supposed to be so Iíd ask them to locate it when they had the skylight out. I gave them wire and the rooftop gland. They told me they couldnít find it (didnít want my money I guess).

The pre-wire was definitely at the front DC distribution area and all my research said that it should be in between the skylight and the rear fantastic fan. I purchased an inexpensive electrical toner and could confirm that the pre-wire was close to the area of the fan. It was difficult to find out exactly where it went due to the toner not working well through the aluminum skin.

Today I got out the drill and punched a hole through the roofÖsuccess! The hole was it within an inch of where the wire was located. Iím so happy and now I can start installing the panels.

And Iím now kicking back and celebrating with a G&T.
Peter C is offline   Reply With Quote
Old 09-19-2021, 04:25 PM   #2
2 Rivet Member
 
2013 27' Flying Cloud
Calgary , Alberta
Join Date: Mar 2020
Posts: 83
Here are a few pictures



[Click image for larger version

Name:	IMG_6666.JPG
Views:	6
Size:	423.1 KB
ID:	404397Click image for larger version

Name:	IMG_6667.JPG
Views:	9
Size:	315.6 KB
ID:	404398ATTACH]404396[/ATTACH]
Attached Thumbnails
Click image for larger version

Name:	IMG_6656.JPG
Views:	8
Size:	313.2 KB
ID:	404396  
Peter C is offline   Reply With Quote
Old 09-19-2021, 04:54 PM   #3
Half a Rivet Short
 
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 12,523
Hi

I'd go with a box that fans out to at least 4 panels on a new install ....

Bob
uncle_bob is online now   Reply With Quote
Old 09-20-2021, 11:16 AM   #4
2 Rivet Member
 
2013 27' Flying Cloud
Calgary , Alberta
Join Date: Mar 2020
Posts: 83
Quote:
Originally Posted by uncle_bob View Post
Hi

I'd go with a box that fans out to at least 4 panels on a new install ....

Bob
Yes I considered a junction box and definitely would have gone that way if I ran heavier gauge wire to the controller.

I do have four Renogy Eclipse 100 watt panels that I hope to install this week. I am planning configure a 2 and 2 parallel - series. With using the 10 awg factory pre-wire I am concerned about too much amperage if I go 100% parallel. My controller would take all four in series but then I would take a big hit with any shading.

We camp in the mountains/foothills the majority of the time so solar is often not that effective when boondocking. I end up running the generator for 30 to 45 minutes each day to top things up.

Thanks,
Peter
Peter C is offline   Reply With Quote
Old 09-21-2021, 08:44 AM   #5
Half a Rivet Short
 
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 12,523
Quote:
Originally Posted by Peter C View Post
Yes I considered a junction box and definitely would have gone that way if I ran heavier gauge wire to the controller.

I do have four Renogy Eclipse 100 watt panels that I hope to install this week. I am planning configure a 2 and 2 parallel - series. With using the 10 awg factory pre-wire I am concerned about too much amperage if I go 100% parallel. My controller would take all four in series but then I would take a big hit with any shading.

We camp in the mountains/foothills the majority of the time so solar is often not that effective when boondocking. I end up running the generator for 30 to 45 minutes each day to top things up.

Thanks,
Peter
Hi

The 10 gauge wire is fine for four panels and still would work for six. That assumes you run them in parallel. If you do a series / parallel setup ( 6 done as 3 strings of 2 each or 2 strings of 3 each ...) you could put a *lot* of solar up there. Yes, there's a bunch of math to back that all up.

Bob
uncle_bob is online now   Reply With Quote
Old 09-21-2021, 09:33 AM   #6
2 Rivet Member
 
2013 27' Flying Cloud
Calgary , Alberta
Join Date: Mar 2020
Posts: 83
Thanks Bob,


I was thinking that at approx 20V and 25ish amps (four panels in parallel) there would be over 5% loss on the 10 AWG. I am using the assumption of 35 to 40 feet of wire from the roof to the front DC distribution area (27FB)).

You think that Parallel would be fine at that length? I did trace the wire using the toner so I could run a string to confirm length.


Peter
Peter C is offline   Reply With Quote
Old 09-22-2021, 07:03 AM   #7
Half a Rivet Short
 
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 12,523
Quote:
Originally Posted by Peter C View Post
Thanks Bob,


I was thinking that at approx 20V and 25ish amps (four panels in parallel) there would be over 5% loss on the 10 AWG. I am using the assumption of 35 to 40 feet of wire from the roof to the front DC distribution area (27FB)).

You think that Parallel would be fine at that length? I did trace the wire using the toner so I could run a string to confirm length.


Peter
Hi

40 feet of wire from the normal junction box to the normal DC bus area is a mighty long run. If you are talking about a 40 foot loop then sure.

10 gauge is a mili ohm per foot. A 40 foot loop is 0.04 ohms at 25A that comes out to 1V. 1V out of 20 is indeed 5%.


Bob
uncle_bob is online now   Reply With Quote
Old 09-24-2021, 12:48 PM   #8
Master of Universe
 
Gene's Avatar
 
2008 25' Safari FB SE
Grand Junction , Colorado
Join Date: Sep 2007
Posts: 12,352
When Lewster mounted two 100 w. panels on my roof he told me the factory 10 AWG wire was undersized and ran another cable through the fridge area. Since Lew has an MS in electrical engineering, I believed him.
__________________
Gene

The Airstream is sold; a 2016 Nash 24M replaced it.
Gene is offline   Reply With Quote
Old 09-24-2021, 02:12 PM   #9
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 11,553
Images: 5
Quote:
Originally Posted by Gene View Post
When Lewster mounted two 100 w. panels on my roof he told me the factory 10 AWG wire was undersized and ran another cable through the fridge area. Since Lew has an MS in electrical engineering, I believed him.
Yup, per Lews posts back in the day, I ran 6 gauge marine stranded from the roof to the controller. Even though I only presently have 200 watts on the roof.
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is online now   Reply With Quote
Old 09-25-2021, 06:48 AM   #10
Half a Rivet Short
 
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 12,523
Quote:
Originally Posted by Gene View Post
When Lewster mounted two 100 w. panels on my roof he told me the factory 10 AWG wire was undersized and ran another cable through the fridge area. Since Lew has an MS in electrical engineering, I believed him.
Hi

Well, there are others around here who also have that same degree ... the math isn't very hard. I've gone through it *many* times in these threads ....

Bob
uncle_bob is online now   Reply With Quote
Old 09-25-2021, 06:53 AM   #11
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 11,553
Images: 5
Quote:
Originally Posted by uncle_bob View Post
Hi

Well, there are others around here who also have that same degree ... the math isn't very hard. I've gone through it *many* times in these threads ....

Bob
That's true, and I did too. I wanted to "future proof" the wiring and I prefer a parallel system for my needs and lifestyle. Running the wiring to the roof is a chore. Once and done.

But 10 gauge was simply too small.
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is online now   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Location of Solar Pre-Wire. Where are the wires? kscherzi Generators & Solar Power 10 06-02-2013 04:06 PM
2010 28' International Solar Pre Wire ?? Streamer1492 2006 - 2010 International 1 09-23-2012 03:02 PM
Solar pre-wire on a 2005 19' Bambi CCD JDL Generators & Solar Power 23 12-22-2010 05:50 AM
Solar pre wire bwaysteve Generators & Solar Power 7 11-21-2010 07:06 PM
Solar Pre-wire 2008 Safari 25 FB SE - Good enough? eheffa Generators & Solar Power 3 10-23-2009 10:30 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 07:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.